Mounting for temperature responsive elements



ec. 9, 1930. H. SCHLAICH MOUNTING FOR TEMPERATURE RESPONSIVE ELEMENTS Filed Oct. 10, 1923 2 Sheets-Sheet l Wwfww I TTORNE Y5 Dec. 9, 1930. H. SCHLAICH 1,734,755

MOUNTING FOR TEMPERATURE RESPONSIVE ELEMENTS Filed Oct. 10, 1923 2 Sheets-Sheet 2 ijyrz. @fi

7m? yim 2 2/ IN VENTOR .4 TTORNE Y5 STTES PATENT OFFIC HERMAN SCHLAICH, OF LONG- ISLAND CITY, NEW YORK MOUNTING FOR TEMPERATURE RESPONSIVE ELEMENTS Application filed October 10, 1923. Serial No. 667,708.

This invention relates to improvements in means for introducing temperature responsive elements into the cooling systems of engines. In United States Patent No. 1,206,783

is disclosed means especially adaptable to inte'rnal combustion vehicle propelling engines, for so arranging a temperature responsive element that an indication of engine operation may be obtained by the driver. It

is my present purpose to provide a simplified means for the insertion of the temperature'responsive element in the cooling system at the most advantageous point with a minimum of labor and without the dismounting of engine, or cooling system parts.

In the drawings which form a part of this specification Figure 1 is a diagrammatic view of an automobile to which one embodiment of my invention has been applied.

Figure 2 shows in cross-section a temperature responsive element embodying my invention.

Figure 3 discloses one method of applying the device shown in Figure 2.

Figure 4 shows, partly in longitudinal cross-section, the device in applied position.

The automotive engine 10 shown in Figure 1 is provided with a cooling jacket 11 connecting through a cooling medium intake pipe 12 and a cooling medium outlet or return pipe 14, with the radiator 15. In many systems a circulating pump 13 is located in the intake pipe to forcibly circulate the water between the jacket and radiator. To allow for expansion and contraction and for the, motions unavoidable to operating machines mounted upon such a base as an automobile or aeroplane frame continually being stressed im different directions, it is common practice to provide flexible connections between the radiator and the engine, such flexible connections being supplied by short hose sections 18 in the intake 12, and 19 in the outlet or return pi pe 14. 1

It is well known that most engine troubles manifest themselves in overheating which is quickly communicated to the cooling medium in the jacket 11 and, since the cooling medium is continually circulating through the pipe 14 to the radiator 15 and back through pipe 12 to the jacket 11, it has, been discovered, as set forth in said U. S. Patent No. 1,206,783, that heat changes may be most quickly noted in the cooling medium as it passes throughthe pipe 14, and that this point forms the most effective point for 10- cating a temperature responsive element.

With the foregoing facts in mind, I have provided the simple device shown in crosssection in Figure 2, adapted to be directly inserted in one of the hose connections, preferably in the hose section 19 of the pipe 14. The temperature responsive element shown in Fig. 2 comprises a bulb shell 20 preferably of drawn metal flared out at the top as indicated at 21. Fitted in the top of shell 20, and. secured by solder 24 or otherwise, is the enlarged head 24 of a stem 23 formed from a thick walled tube, the exterior surface of 7 which is threaded to engage the nut 25 and the cap 26. A washer 27 is also provided below the nut 25 to provide an improved clamping surface as will be hereinafter described. The stem 23 is provided with a longitudinal bore communicating with the interior of shell 20 at its inner end, and adapted to receive the end of a capillary tube 28 which is sealed in position by solder 28 or in any other suitable manner. The capillary tube preferably has at protecting armor 29, which may be of braided wire, theend of which clamps into the cap 26 upon the upper end of the stem 23. Tube 28 serves to transmit the changes produced in the temperature responsive liquid or gas contained in the shell 20 to the distance ty e indicator 30, here shown as mounted in a racket 32 attached to the steering post 33, (see Fig. 1), It will be understood that the mounting and form of indicator 30 may be varied as desired and that this particular form is shown for illustrative purposes only. My invention greatly simplifies installation of the temperature responsive elements, as it becomes only iecesary to out or burn a hole in the wall of the hose, of the same or smaller diameter than the shell 20. The shell 20 is then pushed through this hole, the hose wall being stretched if necessary, and by tilting the element sideways as shown in Figure or shoulder of the flared top 21, as will be best seen in Figure 4, in which a portion of shell 20 is broken away to disclose the manner in which hose 19 is clamped, and thejoint around the stem 23 is made tight.

Those skilled in the art will understand permanently that many changes and modifications may be made in the embodiment of myinvention Without departing from the spirit of the invention or from the scope of the appended claims.

What I claim is:

1. The combination with an engine cooling system circulating conduit of flexible material having an opening through its wall, of a temperature responsive element having a shouldered portion larger than the hole in the conduit wall insertible through the hole in the wall and engageable with the interior face of said wall surrounding the hole, and clamping means on said element arranged to engage the outside of the conduit wall and to firmly grip said wall in cooperation with said shouldered portion of the temperature responsive element to seal the opening in said wall.

2. In a temperature responsive element, an element shell having an interior expansion chamber and a flared rim at its upper end forming an annular clamping abutment, a stem sealed in said shell at the upper end thereof, and a clamp on said stem operable toward said flared rim.

3. In a mounting for temperature responsive elements, an element shell having a flared upper rim insertible through an opening in the wall of a flexible fluid conduit and 4 large enough to engage the inner face of said conduit wall completely around the opening and a washer pressed by a clamping nut engaging the stem of said shell to form contact with the exterior of said conduit.

4. A temperature responsive element of the character described, comprising a cup-shaped shell forming an expansion chamber, the upper end of which is outwardly flared and a hollow stem having an enlarged end fitting in the upper part of the shell adjacent to said flared portion. and sealed therein, said stem having a capillary tube projecting therethrough and sealed thereinto and aclamping member screwing on said stem cooperating with the flared upper end of the shell to grip the element in place.

5. A temperature responsive element of the character described, comprising a shell and stem, a capilary tube projecting through said stem, a protecting armor on said capillary tube extending to the end of said stem and a clamping member screwipg on saidstem and clamping the extremity'of said protecting armor between the clamping member and the stem.

6. The combination with a flexible walled duct forming part of the cooling system of an internal combustion engine, of temperature indicating means including a temperature responsive element having a stem and means for mounting said element in said flexible walled duct, comprising a clamp upon the element stem cooperating with the end of said shell to compress the aforesaid wall about the" hose and to clamp the wall of said hose between the large diameter shell end and the aforesaid clamping means.

8. In a distance type heat indicator, a temperature responsive element adapted to be mounted in the cooling systems of internal 7 combustion engines having a flexible hose portion, comprising an element shell of small diameter provided with an enlarged end and a threaded stem, a capillary tube permanently sealed in the stem, and a nut, said element shell adapted to be inserted through a hole in the wallof the hose portion and to engage its enlarged end with the interior of said wall, said stem adapted to protrude through the aforesaid hole and to engage the nut for the purpose of clamping the wall between the nut and the element end to form a fluid tight seal for the hole.

9. The combination with a flexible walled duct, of a temperature operated indicating means including a temperature responsive element insertible through an opening in the wall of said duct, said element being provided with cooperating clamping members engageable with the inner and outer faces of the duct and surrounding the opening, one of said clamping members being threaded on the element and operable into clamping relation to the other member by screwing it along the element to grin the duct wall firmly and seal the opening in which the element is mounted.

In testimony whereof I have aflixed my signature to this specification.

- HERMAN SCHLAICH. 

